Submission #533519

#TimeUsernameProblemLanguageResultExecution timeMemory
533519idasFeast (NOI19_feast)C++11
30 / 100
49 ms8508 KiB
#include <bits/stdc++.h> #define FOR(i, begin, end) for(int i = (begin); i < (end); i++) #define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr) #define f first #define s second #define pb push_back #define sz(x) ((int)((x).size())) #define le(vec) vec[vec.size()-1] #define all(x) (x).begin(), (x).end() #define TSTS int ttt; cin >> ttt; while(ttt--) solve() using namespace std; typedef pair<int, int> pii; typedef pair<long long, long long> pll; typedef pair<long double, long double> pdd; typedef map<int, int> mii; typedef vector<int> vi; typedef long double ld; typedef long long ll; const int INF=1e9, MOD=1e9+7, mod=998244353; const ll LINF=1e18; void setIO() { FAST_IO; } void setIO(string s) { FAST_IO; freopen((s+".in").c_str(), "r", stdin); freopen((s+".out").c_str(), "w", stdout); } const int N=3e5+10; ll n, k, a[N]; int main() { setIO(); cin >> n >> k; FOR(i, 0, n) cin >> a[i]; vector<ll> nw; bool tg=a[0]>0; ll now=0; FOR(i, 0, n) { if(a[i]==0) continue; if(a[i]>0 && !tg){ tg=true; if(now!=0) nw.pb(now); now=a[i]; } else if(a[i]<0 && tg){ tg=false; if(now!=0) nw.pb(now); now=a[i]; } else{ now+=a[i]; } } nw.pb(now); n=sz(nw); FOR(i, 0, n) a[i]=nw[i]; // FOR(i, 0, n) // { // if(a[i]<0){ // if(i!=0) a[i]=max(-a[i-1], a[i]); // if(i!=n-1) a[i]=max(-a[i+1], a[i]); // } // } // ll sm=0; // vector<ll> negs; // FOR(i, 0, n) // { // if(a[i]<0) negs.pb(a[i]); // sm+=a[i]; // } // // sort(all(negs)); // // FOR(i, 0, k-1) // { // if(i>=sz(negs)) break; // sm-=negs[i]; // } // // cout << sm; ll sm=0; FOR(i, 0, n) { sm+=a[i]; if(a[i]<0){ if(sm<0){ a[i]-=sm; sm=0; } } } sm=0; for(int i=n-1; i>=0; i--){ sm+=a[i]; if(a[i]<0){ if(sm<0){ a[i]-=sm; sm=0; } } } sm=0; FOR(i, 0, n) sm+=a[i]; vector<ll> negs; FOR(i, 0, n) { if(a[i]<0) negs.pb(a[i]); } sort(all(negs)); FOR(i, 0, k-1) { if(i>=sz(negs)) break; sm-=negs[i]; } cout << sm; }

Compilation message (stderr)

feast.cpp: In function 'void setIO(std::string)':
feast.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
feast.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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